Jacquard embroidery-machine.



R, ZAHN. J AGQUARD EMBROIDERY MACHINE.

APPLICATION 'FILED FEBJ. 1911A. 1,020,01 O.

Patented Mar. 12, 1912.

I l w e n-ofo 3513 f6; @Hom/le v ROBERT ZAHN, OF PLAUEN, GERMANY.

JACQUARD EMBROIDERY-MACHINE. I

Specification of Letters Patent.

Patented Mar. 12, 1912.

Appxicafm ined February 7, 1911. serial N0. 607,142.

- Plauen, Vogtland, in the Kingdom of Saxthe boring tools.

. surface.

ony, Germany, have invented certain new and useful Improvements in Jacquard Embroidery-Machines, of `which the following is a specification.

lVith ordinary embroidering machines, that are controlled by the aid of a pantograph, instead of automatically by the jacquard mechanism, every time prior to the .commencement of the boring operation the embroidery frame mustbe'given a movement, so as to bring the place at which the boring operation is to take place in alinement with Since this movement is connected With the pulling out of the embroidery threads from the needles andshut'- tles, a considerable force is herefor required, in consequence of which, in case of improper handling, t-he embroidery design may become distorted and some of the threads even broken. To avoid this, the operator through long experi-ence generally helps himself by giving the main shaft of the machine a few turns to and fro, whereby the shuttles'on the rear of the embroidery frameare caused to also execute a short reciprocatory movement. In this manner the pulling out of the shuttle threads and likewise that of the threads from the needles over their guides and from the thread rollers are greatly facilitated.

The object. of my invention is to provide a device for acquard machines, whereby prior to the commencement of the boringoperation the pulling out of the shuttle threads is automatically accomplished.

The accompanying drawing illustrates diagrammatically a side view of an automatic embroidering machine.

Let 1c-ar denote the embroidery or frame ln front of this embroidery surface operate in well known manner the needles l', the bore tools 2 and the stupfe] 3 and in the rear of the said surface operate the shuttles 4. The operation of the needles 1 is accomplished by a cam 5 and that of the shuttles 4f. by a cam 6. The cam 5 may consist of a disk having a laterally projecting rim with the inner and outer surfaces of which rollers 7, 8 are in contact. These rollers 7, 8 are rotatively borne in a rod 9, whereby through the medium of a bell crank lever l0. movement from the needle operating cam 5 is transmitted to the needles l. Rolling on the circumference of the shuttle operating cam 6 is a roller 11 which is rotatively borne in the bell crank lever l2, 13, whereby through the medium of the rod 14 movement is transmitted from the cam (5 to the shuttle driving mechanisml i5. The divers cams for the operation of the working mechanisms are all fixed von the main shaft 1G of the machine. To these belong also the needle operating cam and the shuttle operating cam (i. Looselv borne, however, on the shaft 1G is a gear 17, which meshes with a gear 1S fixed on the driving shaft 19 whereby movement is transmitted to the said wheel 17. This wheel 17 is capable of being coupled to the cam 5 by means of a suitable coupling 20, 2l. The clutch 2O is formed as a double-armed lever, which is pivoted at 22 to the cani 5 and one arm of which is notched so as to be capable of engaging a pin 2l projecting from the gear 17, while the other arm thereof carries aroller 253, which during the rotation of the shaft 16 comes into the path of a rail 24. The latter is capable 0f swinging around a stationair)I- pivot and the adjustment thereof is accomplished by means of a lever 'ZG'and rod 27. lligidly connected to thcrail Qtand the lever QG is a brake 28, which is provided with a stop 28 adapted to engage a nose L9A projecting from the circumference of the cam 5 ln the position indicated in the drawing of the rail 24 and the rod 27, the clutch arm Q0 and pin 2l are uncoupled: so that the wheel 17 is free to rev volvc, while thc shaft 1G with all thel flying masses thereon through the brake E28 is prevented from revolving until the nose 29 strikes the stop 28. In this position of the cam 5, the recess 30 provided on the circumference of the latter lies opposite a pin 31 the object of which will be hereinafter fully explained.

Apart. from the gear 18, a gear 32 is secured to the driving shaft 19, which meshes with the gear 33 to operate the shaft 34.

The two wheels 17 and 18 have the samenumber of teeth while the number of teeth of the gear 3? is twice as large as that of the gear Fixed on the shaft 1f) is a disk provided with a cam groove by means of which a double-armed lever 3G is caused to swing. A rod 37 connect ed to ,one arm of the lever 3G and provided with the above named pin 31 receives the swinging movenient of the lever 36. Mounted on the shaft 34 is a disk havinga cam groove 38, whereby `free end of which is the lower notch is capable of engaging any one of two stationary pins 43,444. `In4 like manner, the free 'end of the rod 27 is provided with two opposite notches, of which the upper is capable'of engaging the nose 40 and the .lower any one of two stationary pins 45, 46. The rod 27 is borne in a piece 47 and the rod 42 in a piece48, which pieces are adapted to be reciprocated in longitudinal direction by the jacquard mechanism (not shown) controlling the embroidery machine.

The mode of operation is as follows: Assuming the main shaft 16 of the machine has been just stopped in the position indicated in thezdrawing. This was accomplished by the upward movement of the piece 47, through the Jacquard mechanism, which has caused the engagement of the rod 27 with the nose 40, which'rod 27 previously was engaged with the stationary pin 46. Since the lever 39 in consequence ofthe continuous rotation of the cam 38 is `caused to swing there and back, the nose 40 has carried along with it to the left the rod 27. -Immediately thereupon, the piece 47 has been pulled down again, so that the-rod 27 has disengaged from thenose and in its newleft 'position become engaged withthe stationary pin 45. In consequence of this ad. justment 'of the rod 27, the 'brake 28 was.

brought in contactwith the cam 5, the rail 24 has disengaged the clutch arm 20 from the pin 21 and the nose 29 was brought in contact with the stop 28', The diverse Working mechanismof the embroidering machine were thereby7 instantaneously stopped. Only the three ,wheels 17, 18 and 33 and-consequently the'levers 36 and39 continue their i movement. At the next moment, the piece 48 is operated by the Jacquard mechanism in like manner as the piece 47, whereby the rod 42 is first brought into engagement with the nose 41, which moves tothe right,- and thereupon is caused to engagethestationary pin 44. Through this adjustment'of the i rod 42 thepin 31 becomesengaged with the recess 430, in consequence of which the cam 5, owing` to the swinging movement lof the levels-36 is given a shortl swinging movement corresponding to that received bythe rod 37., T he consequence of this movement is that the b'ell crank lever 12, 13 .is given Va short swinging movement. sincethe shuttle s operating cam 6 -an'd needle operating cami. 5 Yare fixed on the saine shaftl-and hence rigidly connected with one another. ,This swinging vmovement offthe lever 12, 13 ret jdriven shaft, cams fixed on suits in the reciprocating movement of the shuttles 4,' since the driving mechanism l5 of the shuttles is connected through the rod 14 to the lever 12, 13. It thus follows that prior -to the commencement of ther movesurface ccf-:r is lowered down from the level of the needles l to that of the bore tools 2 ment of4 the bore tools 2 or the stupfel 3, the shuttles 4 receive ashort reciprocating movement, 4while the embroidery traine or or stupfels 3, in consequence of which the shuttle threads are easily pulled out from the shuttles and theneedle threads are easily pulled over theirf-guides and through the needle ears.

Having thus described the nature of my invention, what I claim 'and desire to secure by Letters Patent is:

1. In a Jacquard embroidering machine, the combination with a drivin part, of a driven part, needle and 4shuttle operating means operatively connected to said driven part, coupling meansbetween said .driving and driven parts, a Jacquard mechanism, and a Jacquard cont-rolled means whereb the driven part is first set at Arestand thereupon the needle and shuttle operating means are given a reciprocatory motion, allowing of the embroidering threads being easily pulled out from theshuttles and over the Vthread guides.

2.' In a Jacquard embroidering machine, the oombinationf'wl a kdrivin part, of a driven part, needle and shuttii operating means operatively connected to said driven part, a J acquard-mechanism, Jacquard controlled couplingrneans between said driving and driven parts, Jacquard controlled means y for setting the driven part at rest and Jacquard controlled means'whereby upon rst setting the driven part at rest, said needle and shuttle operating means arevgiven a reciprocatory motion, allowing of the embroid- 'ering threads being easily pulled but from the shuttles and over the thread guides.-

3. In a Jacquard embroidering machine,

-the combination with a driving part, of a driven part, needle and shuttle operating means operatively .connected to said driven part, aJacquard mechanism, a Jacquard controlled coupling means between the said driving `and driven parts, Jacquard controlled braking means for the said ldriven part andJacquard controlled means whereby uponirst setting the driven part at rest, the Vsaid needle and, shuttle operating means are given a reciprocatoryl motion, allowing of the embroidering threads being easily pulled out from the shuttles and over the thread guides.

4. In a Jacquard embroidering machine,

the combination with a driving shaft, of a shaft, needle and shuttle o eratingvmeans controlled from said cams,a acquard mechsaiddriving trolled braking* means for the said driven part and Jacquard controlled means where- [by upon rst setting the driven part at rest,

the said needle and shuttle operating means 1,0- Vare given a reeiproc'atory motion, allowing of thev embroidering threads being easily pulled out from the shuttles and over the thread guides.

jIn testlmony lwhereof Il-aix my signature in presence of two witnesses.

ROBERT ZAHN.

Witnesses `LOUIS, KELLER, ROBERT HEINRICH NIER. 

